[brorfred]

There are several tool chains but they are either internal on institutional level or commercial. The main numerical library is NAG. Still comersial but cheap compared to the price of most cluster systems that the code is developed for. Heck, FORTRAN is probably the only language where people pay significant sums for the compilers (e.g. pgi, ifort).

[walshemj]

Back in my first job we brought NAG libraries as it was far more cost-effective to buy it in rather than having expensive Engineers reinvent the wheel.

Update some of my coding style is still based on from looking at that NAG code :-)